3. Hormonal Regulation of Fuel Metabolism

Insulin Counters High Blood Glucose in the Well-Fed State

Pancreatic β Cells Secrete Insulin in Response to Changes in Blood Glucose

Glucagon Counters Low Blood Glucose

During Fasting and Starvation, Metabolism Shifts to Provide Fuel for the Brain

Epinephrine Signals Impending Activity

Cortisol Signals Stress, Including Low Blood Glucose